File Sync new files

Hi… is there a way I can only sync changes.
So for example I have a 10Mb directory with say 20 files which has successfully sync’d. I now add 2 new files or 1 changed file and it now sync’s the entire 10Mb again. I want it to only sync the 2 new files and 1 changed file.
Is this possible and how do I do it.

It’s only supposed to sync new or changed files (the whole file, there is no delta sync). It should be done by default, do you have more infos, logs from the client (F12 for the log window) and perhaps from the server? Perhaps a shared folder? External storage? Nextcloud version? Client version?